This is a seldom used tool allows you change the length of line(s) or polyline(s) to a specific length.
To use this tool:
1. Click on the tool (shown above) to open the modifier.
2. Set a specific length by which you want to change your line(s) or polyline(s). This tool will both shorten and extend any type of line to the length you choose—making the line a set length.
3. Click the line you want to set the length of. Make sure you click on the end of the line you wish to change. The line will highlight blue.
4. Right-click to end the process.